Pipelines: Server side deployment state tracking

[Pezmc]

Description

Split into two parts:

• Refactor the existing state tracking to work based on stage deploy state (deduced from instance state)
• Move storage of instance deploy state server side

Key advantages:

• State persists across page reloads
• Deploy complete alert works regardless of what starting state the instance was in

Screen.Recording.2023-06-14.at.15.28.35.mov

Related Issue(s)

N/a

Checklist

• I have read the contribution guidelines
• [-] Suitable unit/system level tests have been added and they pass - Not really clear how to test this. Page already has E2E coverage.
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on flowforge/helm to update ConfigMap Template
  • Issue/PR raised on flowforge/CloudProject to update values for Staging/Production

Labels

• Backport needed? -> add the backport label
• Includes a DB migration? -> add the area:migration label

[Pezmc]

@joepavitt Would appreciate some click testing from you to verify the UI still behaves as you expect!

[joepavitt]

Didn't work for existing pipeline I had, but creating a new pipeline worked at first whilst in "installing", but my local seems to be getting stuck in "starting" again.

Also notice that the polling doesn't seem to be enabled upon refresh? If I click "play" and then immediately refresh, has some instances where the target stage stay locked in "Installing" until I refreshed again.

[Pezmc]

@joepavitt Looks like I hadn't pushed my latest 🤦 , will do a sanity check and retag you! Sorry for wasted time!

[Pezmc]

@joepavitt Ready for a re-review

[knolleary]

Done some clicking around, all appears functional. Refreshing the page, getting the inflight state updated properly. All good.

[knolleary]

The only thing that caught me out was what lead me to raise #2332 as I thought things weren't updating properly. But that's (quite literally) a separate issue.

[joepavitt]

Have managed to get my local up and running again for a couple of days blocked. Will try and get to this review this afternoon as I'm trying to round up the Dashboard work. If Nick is happy though, feel free to proceed @Pezmc